EP0038925A3 - Process for making almost dry alkali cellulose - Google Patents
Process for making almost dry alkali cellulose Download PDFInfo
- Publication number
- EP0038925A3 EP0038925A3 EP81101781A EP81101781A EP0038925A3 EP 0038925 A3 EP0038925 A3 EP 0038925A3 EP 81101781 A EP81101781 A EP 81101781A EP 81101781 A EP81101781 A EP 81101781A EP 0038925 A3 EP0038925 A3 EP 0038925A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- making
- alkali cellulose
- dry alkali
- dry
- cellulose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/08—Alkali cellulose
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3010464 | 1980-03-19 | ||
DE19803010464 DE3010464A1 (de) | 1980-03-19 | 1980-03-19 | Verfahren zur herstellung von wasserarmer alkalicellulose |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0038925A2 EP0038925A2 (de) | 1981-11-04 |
EP0038925A3 true EP0038925A3 (en) | 1982-04-28 |
EP0038925B1 EP0038925B1 (de) | 1985-02-13 |
Family
ID=6097620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81101781A Expired EP0038925B1 (de) | 1980-03-19 | 1981-03-11 | Verfahren zur Herstellung von wasserarmer Alkalicellulose |
Country Status (5)
Country | Link |
---|---|
US (1) | US4341892A (de) |
EP (1) | EP0038925B1 (de) |
JP (1) | JPS56145901A (de) |
DE (2) | DE3010464A1 (de) |
FI (1) | FI66882C (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3147434A1 (de) * | 1981-11-30 | 1983-06-09 | Hoechst Ag, 6230 Frankfurt | Verfahren zur herstellung von celluloseethern mit dimethoxyethan als dispergierhilfsmittel |
US4401813A (en) * | 1981-12-10 | 1983-08-30 | Nl Industries, Inc. | Process for preparing alkali metal salt of carboxymethyl cellulose |
US4547570A (en) * | 1983-10-20 | 1985-10-15 | The Dow Chemical Company | Process for preparing cellulose ethers |
JP5030569B2 (ja) * | 2005-12-27 | 2012-09-19 | 信越化学工業株式会社 | セルロースエーテルの製造方法 |
CA2655035C (en) * | 2006-06-14 | 2013-08-13 | Sappi Manufacturing (Pty) Ltd | Pulp reactivity enhancement |
JP5586186B2 (ja) * | 2009-08-06 | 2014-09-10 | 株式会社プレックス | アルカリセルロースまたはその誘導体の製造方法。 |
WO2022258512A1 (en) * | 2021-06-08 | 2022-12-15 | Nutrition & Biosciences Usa 1, Llc | A process for producing a methylcellulose or hydroxyalkyl methylcellulose |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA546634A (en) * | 1957-09-24 | C. Laughlin Kenneth | Preparation of alkali cellulose | |
US1682294A (en) * | 1928-08-28 | chemistry | ||
GB543301A (en) * | 1940-08-16 | 1942-02-18 | Henry Dreyfus | Improvements in or relating to the production of alkali cellulose and cellulose ethers |
GB611081A (en) * | 1945-03-09 | 1948-10-25 | Mo Och Domsjoe Ab | Improvements in or relating to the production of alkali cellulose |
US2680737A (en) * | 1951-05-17 | 1954-06-08 | Hercules Powder Co Ltd | Alkali cellulose preparation |
US2767170A (en) * | 1951-08-29 | 1956-10-16 | Hercules Powder Co Ltd | Preparation of alkali cellulose |
US2680738A (en) * | 1952-04-11 | 1954-06-08 | Hercules Powder Co Ltd | Preparation of alkali cellulose |
US3085087A (en) * | 1956-09-13 | 1963-04-09 | Hercules Powder Co Ltd | Preparation of carboxyalkyl cellulose ethers |
DE1468226B2 (de) * | 1962-10-31 | 1973-03-22 | Miltenberger Industriewerk P.&B. Weber, 8761 Bürgstadt | Verfahren zur herstellung von alkalicellulose |
-
1980
- 1980-03-19 DE DE19803010464 patent/DE3010464A1/de not_active Withdrawn
-
1981
- 1981-02-23 FI FI810541A patent/FI66882C/fi not_active IP Right Cessation
- 1981-03-11 EP EP81101781A patent/EP0038925B1/de not_active Expired
- 1981-03-11 DE DE8181101781T patent/DE3168851D1/de not_active Expired
- 1981-03-13 US US06/243,502 patent/US4341892A/en not_active Expired - Fee Related
- 1981-03-18 JP JP3801581A patent/JPS56145901A/ja active Granted
Non-Patent Citations (1)
Title |
---|
Keine Entgegenhaltungen. * |
Also Published As
Publication number | Publication date |
---|---|
FI66882B (fi) | 1984-08-31 |
EP0038925B1 (de) | 1985-02-13 |
DE3010464A1 (de) | 1981-10-01 |
FI66882C (fi) | 1986-02-20 |
EP0038925A2 (de) | 1981-11-04 |
FI810541L (fi) | 1981-09-20 |
DE3168851D1 (en) | 1985-03-28 |
JPH0157681B2 (de) | 1989-12-07 |
US4341892A (en) | 1982-07-27 |
JPS56145901A (en) | 1981-11-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
17P | Request for examination filed |
Effective date: 19820327 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): BE DE FR NL |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
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AK | Designated contracting states |
Designated state(s): BE DE FR NL |
|
REF | Corresponds to: |
Ref document number: 3168851 Country of ref document: DE Date of ref document: 19850328 |
|
ET | Fr: translation filed | ||
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
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26 | Opposition filed |
Opponent name: HOECHST AKTIENGESELLSCHAFT,FRANKFURT(MAIN) Effective date: 19851031 |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: HOECHST AKTIENGESELLSCHAFT |
|
PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |
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R26 | Opposition filed (corrected) |
Opponent name: HOECHST AKTIENGESELLSCHAFT ZENTRALE PATENTABTEILUN Effective date: 19851031 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19900222 Year of fee payment: 10 |
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PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19900331 Year of fee payment: 10 |
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RDAG | Patent revoked |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT REVOKED |
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27W | Patent revoked |
Effective date: 19900409 |
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NLR2 | Nl: decision of opposition | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19910320 Year of fee payment: 11 |
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PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19910503 Year of fee payment: 11 |
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BERE | Be: lapsed |
Owner name: HENKEL K.G.A.A. Effective date: 19920331 |
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APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |